砂岩孔隙网络特征参数及其在储层评价中的应用  

The porosity network character parameter of sandstone and the application in reservoir evaluation.

作　　者：吴凡[1] 孙黎娟[1] 管玮[2] 

机构地区：[1]中原石油勘探局勘探开发科学研究院 [2]中原石油勘探局炼油厂

出　　处：《油气采收率技术》2000年第1期47-49,共3页

摘　　要：根据砂岩孔隙网络的基本流动单元特征 ,引入描述孔隙网络特征的一个新参数即孔隙网络特征参数。该参数是孔隙网络体系宏观特性即渗透率、孔隙度和微观结构特征 (喉道大小、孔喉比、孔隙配位数、喉道迂曲度等因素 )的综合表征 ,一般砂岩的孔隙网络特征参数小于 0 .7。实际的室内实验资料研究表明 ,该参数与储层的原始含油饱和度、残余油饱和度以及水驱油效率、无水采收率等密切相关 ,回归所得方程的相关系数很高。在储层分析、研究与评价中具有重要意义。其作用是目前的孔隙微观结构特征诸参数无法替代的。A new parameter, character parameter of porosity network, has been introduced to describe the character of porosity network based on the character of the basic flowing unit of sandstone porosity network. It is a synthetic characterization of macro properties (permeability, porosity) and micro structural character (size of pore-throat, ratio of porosity and pore throat, pore coordination number, crookedness etc). The value of the parameter is generally less than 0.7. The practical laboratory researches show that this parameter has a close relationship with the original oil saturation, residual oil saturation, the water-drive-oil efficiency and water-free recovery; the correlated coefficient in regression equation is very high. The parameter has an important significance to the reservoir's analysis, research and evaluation. At present, it is far better than many parameters such as porosity microstructure character and so on.

关 键 词：孔隙网络 特征参数 储集层 油田注水 砂岩 

分 类 号：P618.130.2[天文地球—矿床学] TE311[天文地球—地质学]